Air-heating furnace



Feb' 28 l660,565 J- MULDER AIR HEATING FURNACE Filed Nov.' s, 1927 2 Sheets-Sheet` l lllh ,f A TTORN'E y Feb. 28, 1928. 1,660,565

J. MULDER v AIR HEATING FURNACE Filed Nov. s. 1927 2 sheets-sheet 2 nul-un 2f gigi.

ATTORNEY y readily: cleaned.`l

"JoENMnDRg, orA ZEELAND, rifteinden.

i Ain-HEATING' ernennen-- application mefi'november ai 1927; seriell-Np. 230;,702".

'l he present invention` relates* to' *air-heat-y ing? turna-ces and. its object is,"V generally' to. provide improvedxineans for heating the air by the hot smoke and?. products ofs combus-v tion: issuing; troni the"y i'urnaoefs'aid means comprisingV passages orthe f air: tov be heated. and; passages.l for the smoke: and.r such. prod-V uct-s yarranged andA combined eompactlyf and.

controlled in. auf improvedk and eleetive:

manner; and further, totproyi'dein such a structure' ysuchI .passages so# arranged .1 asf tobe' Thisrand any other andimore specilic'objects hereinafter appearing are attained by, andi, theA inventionvf'mds preferable embodiment in, the:V fumare` structure hereinafter particularly described. in the -bodyl of this specilieati'on and illustrated. by' the accoin- V16. These: verticallrpartitions alsosepara-te purifyingy drawings'` i1i'Wliicli:-` 'y Figure 1- is asideielevational: View of an lairflieating. furnace and'itsrasings', certainV vpartsbeingiibrolrenaway; A

. ll`1gure21isa ver't1cal1sectional View ofa.

portion ofA the'v sameY taken .on linev 2-'2Hof/ Figure-3;. .p Y f y Figure 3 is a top Vplan View of the'f same; and l Figure 4':isaverticalfsectional View ofte portion `of s'ad.` stritoture' taken* en line *f1- 4 of Figure 3.

. In' the einbodimentvofftlecinfventionillus-; trated'. by these', drawings; anrairiheaftingf tu-rnace construction is shown ineluding'f a` furnaeel ot common form havingthe'usual fuel door2, ash" doorf and sinolie pipe'l'. AT casing 5 surrounds'v this' :furnace at its sides andtopy in. the ordinary manner'beingspaoed therefrom totl provide lan air-heating cham'- r ber''fr'om which the hot air pipes-7 leadto thel roonifsorr parts ofthe lbuildin-g to be- Warin'e'di. A; second n and outer casing 8;' extending horizontally about the cas-ing 5 and havinga top Wall 9'Abottom wall/1.0, outer sidewall 11 andfrontendwallslll, 13,'fis diyid'edby horizontally spaced verticalp'artiti'oiis. 14,.y 15l to' forni between- 'them sage 30 yfor sinokeandj `products lof Combustion entering thereinto from the furnace at on the opposite sides of saidsmoke; passage a pair 'of air passagesl?,18V-extending out siffle ot; and horizontally alnvoiutf the opposite sides respectively ot'fthe inner* casingf andha-vingsaidfrontend'walls 12, 13, and cold air intakes 21, K 22. Horizontally disposed partitions 23, 24 extend in these air passages f'rointhe-'verticall partitions 14E forwardlyV to lfront edges 19 spaced'troni the forward .Y

end: Walls 123113' as particularly Well seen in Fign'real.-V f y; Y

ln these lair passages. `17, 18',snoleconf the vertical partitions 15, 14 and are'spa'ced: from the other Wallsof said air passages. These. conduitsentend; horizontally at 29, :31

duitsqfZ/g;26 leaolfrom'. ports 27,28 through abovefthe'horizontal partitions-23, 24, then,

downwardly at 345,.-.35vand spa-cedly-ffroin theedges 19 thereoffandf thenbelowthese" horizontal partitions and' "horizontally rie smoke passage SO-"Whence'the ysmoke vrandi' products of ooinbustionfpass' .intoiand. t-hroughftlie smoke pipel. i' v Y Thatftlie'l smoke,l etc.1nay bemade to pass into andthrongfh theconduitsv, V26 to Warm:

the :air-intherpa'ssages V17, v185' or directly into A the smoke pipe 4 as maybe desired, the smoke by a-- horizontal partition 42' thus forming a smole"` passage lf3 hewingv the'y :bottom: Wallf424 and saiduports2f', 28'.. A Valve is carried` passageBO is-.d-.iv'idedfby -a'vertioal partition 4:0 yhavingg 'a smoke vent 11' therethrough and:

tofwhifeh iseonnected the operati-ngrod 457-.

smoke vent 41r when the-fvarlve': is turnedV to the? position shown ini sol-iidV lines .ini FigureY 2, and has`A also' p'airf oilL opposite members e9,- j opening'thez ports 275129'fin'i said post 'i tion4 ofthe. Vailyezfl 1 TWhen 'however this y'altie)` 1s turned to the position seenlin` solidv lines in Figure! 41,1 the-smoke y'entYHis opened and the ports@ 28. are*closedl Thisyalve may thusb'elturned'ieitherfto y'the position seen insolid 1 lmies: in=jFigure .11 whereby -the smoke and'p'rodu'etsoliconibustion- :p ass inthe ordinary: 'manner'intor the smoke-pipe e," or to the position shown in i vsolid 'n lines f in Figure' 2 wherebyv the smoke;- etc'. must; pass' through" passages.: 1f?, 1'8Fwyhenceit is Vented through' pipes51,-5l2 iinto the chamber-61 formed byl the inner easiiilg 5?.

The partition 42 p off smoke 'passager 13 isliir-igedly mounted' at:

forming the botto-1n Wall rand-inay beheld' in normal or horizontal position seeninf Figure 2by supportingj- `f' rod pivoted thereto 21u55", 'f its tree. end restingontlre clfe'sure 56 hingedlynrounted at 57"v and adapted'to be'lreldasby alatch 5585" in horizontal position to close the openings 59 through the bottom `Wall 10 of casing 8.

Thisy closure being openedand the rod 54 swung to permit the bottom wall 42 tofall to vopen position, any soot and Ythe like de` posited thereon will drop through the open ings 59. n

The conduits 25, 26 have openings indi-y cated YatO through which soot, etc. therein may be removed, suchopenings being closed f by closures 6l.' The usual damper is shown at 62 for the air opening 63 into the smoke passage.

The invention being intended to be pointed out in the claims, is not to be limited to or by details of construction ofthe particular'em- 'Vor hereinbefore described.` Y

Y second port and reversely Vto a vent into said y smoke passage, Vand: a valvel controlling at bodim'e'nt thereof illustrated by the drawings j 1. Anair heater of the character described having a Vfurnace with a smoke pipe, an air heating chamber surrounding the. furnace provided with a hot. air. discharge fpipe, an air passage outside said chamber 'extending horizontally about .the same and venting Vthereinto, va smoke passage .leading from the furnace and provided with a 'port to the smoke pipe and a second port, a smoke conduit in the air passage extending from the least one of the ports. Y v

. 2. An air heater of the character described lhavingafurnace with a smoke `pipe,`an air heating chamber surrounding the furnace,` provided with a hot vair discharge plpe, an

air passage outside said chamber extending horizontally :about the same and venting thereinto, a smoke passageleading fromthe furnace and vprovided witha port to the smoke pipe and 'a second port, a smoke conduit in the air passage extending from the second port and reversely to a vent into said smoke passage, andra valve movable to a o- Y n sition closing either of the ports and ,opening the other port; Y l

3., An air heater of the character described Vhaving a furnace with a smoke pipe, an air a heating chamber surrounding the furnace provided with a hot air discharge pipe, an afr passage outside said chamber extending horizontally about the same venting there into and provided with a Vhorizontal partition, a smoke passage'leading from the furnace and provided with a :port-tov the smoke pipe and a ,second port, a smoke conduit in the air passage extending from the second portk and at one's'ide of the partition then spacedly from the partition vto ythe opposite Vside thereof and then to a vent fintosaid smoke passage, and a valve movable to a position closing either of the ports and openfingfthe other port.

4. vAn air'h'eater of the vcharacter described having a furnace with asmoke pipe, an'air Vport and to another passage extending. horizontally aboutk the..

furnace and provided with a `discharge vent, a smoke passage leading from the furnace and provided with a port tothe smoke pipe and a second port, a smoke conduit in the air passage extending horizontally from the second-port and reversely to a vent'into said controlling at,

smoke passage, and a valve least one of the ports. Y

5. Anv air heater of the character described having afurnace with a smoke pipe, a pair of air-passages extending horizontally about the oppositesides respectively of the furnace andvprovided with discharge vents, a smoke passage between they air passages leading:

, from the furnace and provided with aportaV to thesmoke pipe and a pair of other ports,

a smokel conduitin each air lpassageextendinghorizontally from one of said Ipair'of ports and'reversely to a vent into said smoke passage, and a valvevmovable to a position closing the first-mentionedport and vopen-V ing said pair ofports and vice versa. Y Y

6. An air heater of the character vdescribed having a furnace with a smoke pipe, a casing surrounding the furnacey formingv an air heating chamber provided with hot air discharge pipes, a casing extending'horizontally about the first-mentioned; casing and ,pro` vided with spaced vertical partitions forming between thema smoke passage leading from the furnace provided with v'a port to` the smoke pipe and a pair of other ports through the partitions respectively said partitions -Y also forming on the opposite sides of the smoke passage a pair of air passages extending horizontallyabout the opposite sides of the first-mentioned casingand venting there-l partition, a smoke conduitinv each air passagefextending Afrom one of said pair of ports and at one side of the horizontal partition then spacedly from the same to the opposite i vside thereof to a vent into said smokev pas-l into each air passage having a horizontal sage, and a valve movable to a position clos-v In testimony whereof I have hereunto .sety l Vmy hand at Grand Rapids,

28th'day of October, 1927. l JQHNMULDER.

Michigan, this 

